Part of macOS
intelligenceplatformdApple Intelligence
○ Leave it
Runs Apple Intelligence features on your Mac.
What it is
Powers features such as Image Playground, writing tools and visual intelligence.
Why it might be busy
While you use these features, or after an update. Usually a few minutes.
If you stop it
macOS starts it again straight away. Leave it.
The verdict
○ Leave it. Part of macOS, or something that starts again by itself. You never need to close these.
In Activity Monitor
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From Procession’s guide, in the words the app shows.